11-12 December 2018
Center for Astrophysics and Gravitation, Instituto Superior Técnico, University of Lisbon
Europe/Lisbon timezone

Photon emission from dark mediators in White Dwarfs

12 Dec 2018, 10:25
25m
Anfiteatro Abreu Faro (Center for Astrophysics and Gravitation, Instituto Superior Técnico, University of Lisbon)

Anfiteatro Abreu Faro

Center for Astrophysics and Gravitation, Instituto Superior Técnico, University of Lisbon

Av. Rovisco Pais 1 1049-001 Lisboa, PORTUGAL

Speaker

Marina Cermeño Gavilán (Universidad de Salamanca)

Description

We consider self-annihilation of fermionic sub-GeV dark matter into metastable mediators inside white dwarfs (WDs). We assume these mediators decay into two photons after being produced. We calculate the luminosity of WDs due to these annihilations taking into account theenergy loss of the mediator and its finite lifetime in the dense stellar medium. Finally, using complementary sets of measurements ranging from cold white dwarfs in the M4 globular cluster and direct/indirect searches we discuss constraints on mediator lifetimes.

Primary authors

Marina Cermeño Gavilán (Universidad de Salamanca) Dr M Ángeles Pérez García (Universidad de Salamanca)

Presentation Materials